Finding the Fourth Proportional to 172,916.39, 259,397.27 and 67,721.69

Step by Step Solution

1. Step 1: Write the proportion equation
   172,916.39 : 259,397.27 = 67,721.69 : x
2. Step 2: Convert to fraction form
   172,916.39/259,397.27 = 67,721.69/x
3. Step 3: Cross multiply
   172,916.39x = 259,397.27 × 67,721.69
4. Step 4: Simplify right side
   172,916.39x = 17,566,822,323.58
5. Step 5: Solve for x
   x = 17,566,822,323.58/172,916.39
6. Step 6: Final answer
   x = 101,591.42